Ovarian Cancer Screening and Ovarian-Adnexal Reporting and Data System.

Ovarian cancer is the second-most common gynecologic malignancy and one of the leading causes of cancer-related deaths in women. However, its incidence remains low, accounting for approximately 1% of all types of cancers. Ovarian cancer encompasses a heterogeneous group of tumors classified based on distinctive histopathologic and molecular features. Epithelial ovarian tumors are the most common type, accounting for approximately 90% of ovarian cancers, and can be further divided into type I and type II cancers. Type II epithelial ovarian cancers are the most common and most aggressive, with high-grade serous carcinoma being the most common subtype.